Hand-bellows



JoHN GEENNELL,V or SPRINGFIELD, MAssAcHUsET'Is.`

HAND-BE'LLOWS.

Specification of Letters Patent No. 872, dated August 3, 1838.

T all 'whom it may concern.'

Be it known that I, JOHN GRENNELL, of Springfield, in the county of Hampden and Commonwealth ofl Massachusetts, have in- Vented a new and useful Improvement in the Construction o-f the Hand-Bellows; and I do hereby declare that the following is a p full and eXact description thereof.

The bellows constructed with this improvement, is a double chambered bellows l consisting of three boards connected by folding leather sides in the usual way of con-` structingV the hand bellowsthe midway board A, with one of the outside boards B, have each a handle while the other outside board, C, has no handle. The two boardsl with handles haveeach a circular hole inthe center with Valves, D, D, through which the air passes, between the handle boardsand theninto the other chamber, from which it is forced out at the tube or nose of the bellows by means of a spring which compresses the boards ofthe last mentioned chamber in the same manner that the weight does on the upper board of the common blacksmiths bellows, and resembles "it except that the board which has no handle, is made to force the air from the chamber by means of a spring; it is immaterial which side of the bellows is uppermost. The constant blast is kept up by working the handles in thel usual way, in whatever position they are Y held. The spring which seems best adapted to this use, is a spiral-shaft spring E, E, viz: a wire coiled at each end and bent in such form that t-he two spiral ends may be made fast to the center board, about four inches apart, on each side of the valve, while the center part of the wire is bent into two right angles and form the shafts which by means of a leather strap are attached to theA opposite or outside board. The peculiar ad-` vantages of this bellows are the constant` blast, in whatever position they may be held and the improssibility of inhaling any fire or air through the pipe or nose into the chamber, by which the common bellows is so g liable to be injured and is so unsafe in re- This specification may be better understood by reference to the annex` gard to fire.

draft.

Vhat I claim as my invention and desire l tov secure by Letters Patent is- The application of the double chamber i and the constant blast in the construction of the hand bellows, by means of a spring, operating as herein set forth.

JOHN GEENNELL.

Vitnesses V HERMAN SMITH, JOSEPH W. GORHAM. 

